Clipping-shears.



F. C. BIGGERT, JR.

CUPPING SHEARS.

APPLICATION FILED NOV. 30. m4.

Patented Nov. 7, 1916.

3 SHEETS-SHEET I.

WITNESSES.

j-Kmwew WKM m: mvwrs PETERS co. PNDm-UTND" WASHINGTON n. c.

F. C. BIGGERT, JR.

CLIPPING SHEARS.

APPLICATION FILED NOV. 30. 1914.

Patented Nov. 7, 1916.

3 SHEETS-SHEET 2 FIG. 2

I l FIG. 10

WITNESSES.

- Wffihw F. C. BIGGERT, 1n.

CLIPPING SHEARS.

APPLICATION FILED NOV. 30. 1914.

1,203,842. Patented Nov. 7,1916.

3 SHEETS-SHEET. 3.

Fl 6 4s WITNESSES. F15; mvzmroa. v

WKQZZZ FLORENCE C. BIGGERT, JR., 013 GRAFTON, PENNSYLVANIA,

ASSIGNOR T0 "UNITED ENGI- NEERING 85 FOUNDRY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CGRPORA- TIoN'oF PENNSYLVANIA.

oLIrrINe-sHEaRs.

mosses.

Application filed November 30, 1914.

To all whom it may concern Be it known that I, FLonnN on O. Brenner, Jr., a citizen of the United States, and resident of Grafton, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Clipping-- Shears; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to clipping-shears.

In the manufacture of butt-weld tubing, the skelp is drawn through the welding-bell so as to bring the edges into contact for welding. In order that the front end of the skelp to which the tongs are attached may enter the welding-bell readily, it is customary to clip ofi the end of the skelp so as to have the end portion in the shape of a truncated cone.

My invention has reference to a clippingshear for clipping the ends of the skelp in this manner, where a long strip of skelp is cut into proper lengths, and at the same time clipped in the above mannerby a continuous process, and thereby reducing the waste due to crop-ends, at the same time greatly reducing the labor in the handling of the skelp.

To these ends my invention consists, generally stated, in upper and lower knives so shaped as to cut the metal diagonally, an auxiliary lower knife adapted to cooperate with the upper knife to make the cross-cut, whereby triangular pieces are cut from both sidesof the skelp, and finally, an auxiliary upper knife which cooperates with the lower stationary knife to make the final cross-cut to sever the skelp-blank from the main sec tion. I

In the accompanying drawings, Figure 1 is a front view of my improved shears, shown in duplicate; Fig. 2 is a side view with the pinch-rolls in section; Fig. 3 is an enlarged sectional detail of the knives; Fig. 4 is an enlarged sectional detail, showing the upper and lower knives in cutting position, and the lower auxiliary knife up in position for cutting; Fig. 5 is a sectional view of aportion of the end of the skelp; Fig. 6 is a plan view before the final out has been made; Fig. 7 is an enlarged sectional detail showing the manner in which the skelp is curved to bend slightly; Fig. 8 is an inverted plan view of the top knife; Fig. 9

Specification of Letters Patent.

Patented Nov. 1916.

Serial No. 874,742.

is a plan view of the bottom knife, and Fig. 10 1s a plan view of a portion of the skelp showing the clipped end.

As stated above, my improved shears are shown in duplicate, but in describing the same, the parts will be referred to in the singular number.

The numeral 2 designates a suitable frame which hasthe bracket 3 for the support of the motor 4. The motor-shaft has the pinion 5 which meshes with the gear-wheel 6 on the shaft 7, and said shaft has the pinion 8 which meshes with the large gear-wheel 9. This gear-wheel 9 is mounted rigidly on the shaft 10. A clutch-member 11 is rigidly mounted at one end of the shaft 10, and said clutch-member is adapted to be thrown into engagement with the clutch-member 12, loosely mounted on the shaft 10. is

clutch-member 12 forms part of a sleeve 13 which carries the eccentrics 1d and 15, said eccentrics being inclosed within the eccentric-straps 16 and 1.7 respectively. The ec centric-rod 18 is connected up to the upper knife-block 19 which carries the upper-knife 21, provided with the diagonal cutting edges 22, and the cross-cutting edges 23. The up per knife also carries the auxiliary crosscutting knife 24, whose cutting edge 25 is slightly above the cutting edges 22 and 23 of the upper knife.

The lower knife-block 26 carries the lower-knife 27 with the diagonal cutting edges 28, with which the diagonal cutting edges 22 of the upper knife cooperate. This lower-knife 27 is stationary, and a former or shaper 29 which is secured to the knifeblock 26 by a bolt 30, projects over and rests upon the upper face of the knife 27. The edges of the former 29 are rounded as at 31 so that the clipped end of the skelp is slightly rounded as at 33 by the clipping operation, as indicated in Figs. 5 and 7.

The lower auxiliary cross-cutting knife 3 is supported in the block 35 which moves in suitable guides 36 and the lower end of said block is connected to the arm 37 of the toggle 38, the lower arm 39 of the toggle being connected to the crank-arm 40 on the shaft 4:1. A rod 42 is connected to the crank-arm 4:0 and said rod is connected to the eccentric-strap 17 of the eccentric 15.

The long length of skelp 13 to be cut is fed to the shears between the pinch-rolls 4:5.

These pinch-rolls are driven by a train of gearing 46, connected up with the large gear-wheel 9. V

In the operation of the machine, the skelp 74-3 is advanced into position between the knives and the operators throw the clutch '11 into engagement with the clutch 12,

whereupon the eccentrics 1i and 15 are rotated, and the eccentrics are so arranged with reference to each other that the eccentric 1% which controls the movement of the upper knife, first lowers said upper knife -2-1, bringing its diagonal cutting edges into engagement with the skelp and the further downward movement of the upper knife cuts the skelp diagonally, the cutting edges 92 of the upper knife cooperating with the cutting edges 28 of the lower knife, and as said upper knife descends, it also acts in" connection with the former 29 to slightly bend the edges of the skelp, as clearly indi cated in Fig. 7. The eccentric 15 is so timed to raise the lower auxiliary knife just as the upper knife is completing the diagonal out as indicated in Fig. at, and said auxiliary knife 34; is raised by the toggle 38 up into the position indicated in l? 4, so

as to have its cross-cutting edge cooperate with the cross-cutting edges 23 ofthe upper knife, whereby the cross cut made partially at each side of the skclp, so as to cut out a triangular portionat each side, as

Whenthis has been acindicated in Fig. 6. co1n1i)lished,the lower auxiliary knife 34: is withdr: wn as indicated in Fig. I), and the upper auxiliary knife 2% by the further descent of the upper knife, acts to complete the cross-cut, its cross-cutting edge 25 cooperating with the cross-cutting edge 28 or the lower knife 27. lVhen this out has been completed, the upper knife is withdrawn and the skelp-blank which has been clipped is fed forward by the pinch-rolls and the skelp 4:3 is advanced for another cutting op eration. In this manner I' provide for the fdiagonal clipping of the skelp, and the crosscutting so as to give skelp-blanks with straight ends, while at the same time the clipped portion of the skelp'is turned upward to facilitate its entrance into the welding-bell.

What I claim is: r 7

'1. In shears, the combination of an upper knife and a lower knife havin diagonal and cross-cutting edges, means IOl raising V and lowering the upper knife, an auxiliary 7 lower cross-cutting knife cooperating with Copies of this patent may be obtained for he cross-cutting edge of said upper knife,

means for raising and lowering said auxiliary cross-cutting knife, and an aux liary cross-cutting knife on sald upper-knife cooperating with the cross-cutting edge of the agonal out, whereby the. lower auxiliary cross-cutting knife cooperates with the moss-cutting for low ting knife after the completion oft-he cut, and an upper auxiliary cross-cutting knife with its cutting edge above thecutting edges of said upper knife, and cooperating wih the cross-cutting edge of thelowerknife tocomplete the cross-cut.

In shears, the combination'of an upper and lower knife having diagonal cutting;

edge of the upper knife, means ang said lower auxiliary cross-cut-v ed es and cross-cuttin ed 'es a former on the lower knife, the upper knife'having a recess conforming with the shape of said former, and knives cooperating with the cr(. ss-cutting edges of said upper and lower rnives, whereby the cross-cut is made completely across the skeln or other object. 7

4:. In shears, the combination of upper and lower knives having diagonalicuttng edges and straight cross-cutting edges, and V auxiliary cross-cutting knives cooperating with said upper and lowerknives, whereby the cross cut is mane completely acrossthe skelp. 7 v i 5. In shears, the combination of upper and lower knives, having diagonal and cross-cutting edges, an eccentric, connections. between said eccentric and the upper knife, the lower auxiliary knife having across:

cutting edge cooperating withthe cross-cutting edge ofithe upper knife, an eccentric,

connections between said eccentric and said auxiliary knife, and an upper auxiliary knife having a cross-cutting edge cooper-at ing with the cross-cuttingedge of the lower knife. 7 V V In testimony whereof I, thesaid FLORENCE Brenner, J12, have hereunto set my hand. FLORENCEC. BIGGERT, JR. Witnesses: V i V EDWARD Jo'vns, ARNOL P. BARK.

five cents eaclu by addressing the "Conuniss ioner'ofjPatents, Was1 1ington,D G, V 5 j 

